This does not help our cause. It just perpetuates the misconception that van dwellers are problematic, and potentially dangerous.
People are obviously telling you that they would like you to move, and therefore you should.
Where you park has a lot to do with how you're going to be treated. I have a severe dislike for commercial/industrial areas. If it isn't cops/security, it's drunks and/or disrespectful homeless people, frequently on drugs, so it's no wonder that you get lumped in with them.
I'm not familiar with the exact area you're in, but I do sometimes spend time up there. I park near large apartment complexes, on the street, along with all of the other overflow parking from the apartments. Never have any problems.
Unlike what many report, I'll stay at the same place for as long as I'm in an area, often a couple weeks to a month. If you're actually living in that area, I don't know how long is okay before relocating, but there are so many of these types of apartment areas all over the country, that I never have any trouble finding one. I can usually find multiple choices within a mile of the area I want to be in.
Around these apartment complexes, it's a whole different mentality. Safe, friendly, and usually non judgmental. It gets you away from that homeless, druggie, atmosphere and attitude.
On the rare occasion that I either get asked to move, or someone's actions indicate that they'd like me to move, I do, simple as that. I never confront anybody, unless I catch someone trying to break in to my van, or otherwise causing problems in the neighborhood I'm in.