Sorry, ATank, I think you may have taken the posts from James and I incorrectly as if we were coming after you (which we weren't, our gripe is with the outdated thinking in the vegan movement by some "experts" who try to equate more than minimal protein intake with a reduction in optimal health.) The "hippies who can't bench press an empty bar" comment by James was directed toward those in the vegan world who are still lying to anyone who will listen in regard to protein = bad, as those people more often than not are some of the ones who look to be the least physically fit, and wouldn't know proper diet and training protocol if it came up and bit them on the backsides.
I do agree, there's little reason to take in high protein if you aren't leading a lifestyle to where it is conducive to do so (such as, being involved in weight training, working a highly physically demanding job, or being an athlete of other sorts). If you're a 150 lb. couch potato, there's no need to take in 300g of protein per day, fair enough. However, there's no reason to believe that taking in plant-based protein at an amount equal to what you've found to be reasonable for you with non-vegan proteins in the past is going to be detrimental to your health.
So, if in question about being healthy with higher protein, get a blood panel done at your physician to ensure all your test results come back at healthy levels to start with. Then, take in whatever you think is reasonable/necessary to have the physique you want to have (or, wish to keep), and train accordingly, then re-test in say, 4-6 months to see if there are any changes. If levels are the same, then obviously, things aren't getting out of whack with higher protein. If levels are imbalanced, then you can reduce the protein as needed until you get things in alignment again. Without having a helping hand from science (if knowing 100% that you're not taking in more protein than necessary is required for peace of mind), you'll just be guessing what could be "too much" for your needs, and you'll likely just end up confused.
But, overall, if you're engaging in regular weight training, are staying active, are eating healthy foods, and have zero pre-existing conditions to warrant worry, I can't see any reason for concern over taking in the same amount of protein from vegan sources that you had been from non-vegan ones. If nothing else, you're giving your body a better source that will put less stress on it than by having to break down animal by-products for consumption, so that right there is a step in the right direction by itself!
There is no denying that "politics" definitely played a part in the rise of vegetarianism/veganism and making protein the enemy was a wise move in this regard although it may have been inaccurate. However, there is no denying that an excess of protein, regardless of the source, will put more pressure on ones liver, kidneys, pancreas, and so on. My question is exactly what constitutes and excess and does that value depend on the source (plant or animal)? I was hoping someone here had either come across any research that discusses this or has any personal experience with this. I am not trying to equate protein with death, nor am I a hippy who cannot bench press an empty bar. I just want to continue to maximize my health while keeping that in balance with my desire to still have a bodybuilder'esque physique. I hope the two are not mutually exclusive.