I'd really love for someone else to chime in to get some more balanced feedback (I'm really not railing against you personally, I just don't think I should be condoning this practice in any way) -- but the amount of domains you own is super huge... If you're working on that many ongoing projects actively, you are super human.
Also, gaming the system LESS than the worst offenders doesn't make you a "nice guy". It just makes you a less-mean mean guy.
Based on your stated opinion, there is absolutely no problem with anyone with the resources to grab up any domain they think they might use, sometime in the future. This is not a good (nor efficient) way to use limited resources. It is not absolutely the case that someone else will use it, that is an un-certifiable (at best) or false (at worst) assumption.
It seems like I could do a simple s/domain name/patent/g and get the opinion of every patent troll ever