I didn't have any issues with the presence of homeless people besides the previously-expressed slight surprise at how close to the con itself some of them were this year, so I won't comment on that (again, I never felt unsafe, but I was also almost always walking with a group), and I'm not OP, but I did mention that the homelessness is a bigger structural issue than just something with Fanimecon, and I feel like other posters before me were dancing around that point with the comments about "not getting too political" (blahblahblah structural inequalities and poverty being the issue etc. etc.).
As for the bacon hotdog vendors...I have no problem with them there generally, it was just a mild annoyance that there were so goddamn many, to the point where it was hard to walk along that sidewalk at times, especially in large and delicate costumes, as already expressed. The marketing that was "a bit aggressive" was mostly referring to those who would continue to try to convince me I needed a hotdog even after saying "no thank you." Easily solved by just continuing to walk away (as I did), but still not entirely pleasant to have to deal with along with dodging the carts in cumbersome costumes and already feeling nauseous from the smell. At least I didn't have anyone actually stop their cart in front of me while I was walking this year (has happened in the past with some ice cream vendors...not a big deal still, but it was clearly not a stop because someone wanted an ice cream or because of crowds). Honestly, my complaint about the vendors was pretty mild overall, and I feel like your post is seriously escalating things to a level of aggression and pettiness that wasn't in this thread before.
Re: increased police presence, I didn't notice that, but I did notice a lot of sirens this year, possibly more than previous years. Was there an increase in medical emergencies or other issues, or was I just taking more notice, I wonder?