welcome to the FF, because the other questions are already answer, i'll go ahead and put my personal put into the third one, since it might be handy to hear it from a non-fur too..
anyways, personally, i dont really care about furry art, i dont look at it, but by all means, let it exist, i dont mind. but when it comes to adult art, eehm... no thanks, i'd prefer not to see it...
then again, people complain over regular art too, but in those cases its mainly the fact that people think its weird, and you won't really get a lot of trouble for it... about making your art available to furries only, that's up to yourself, as your putting yourself up for a wider audience when you do it, with all the consequences it has... aka, more people will view your art, but not all of them will apreciate it because there are people who dont like anthro art out there, that problem won't be there if you make it viewable on furry websites only, but yeah, there will be less people seeing it.