) on more than one occasion, with parents in tow. I have yet to understand these people. Anyhow, I generally cover up my sidearm and answer the door, but last night I had a guy knock (quite loudly) at like 9pm. I checked the peephole and windows and asked him to state his business, and he gave his full name and the name of the organization he was petitioning for, and I could see that there was no one within at least 40 feet in any direction. I already knew I wasn't going to sign his paper, and didn't cover up this time. He gave me his speech about his cause (some water quality organization) and said they were trying to hold politicians "accountable" on water quality. I asked him what his organization was going to specifically do, and he repeated the "goals". I pointed out that those were no plans of action, and asked if the organization had a website. He said there was, but didn't give me an address, and continued emphasizing his (well-intentioned, I guess) goals. I told him plainly that I'm not going to sign a petition in support for an organization I knew nothing about, let alone give them my money. He didn't seem pleased by my reasoning, and left immediately without even giving me their website address to look up their info.
I don't think he noticed the Hi-Power on my hip the entire conversation - probably for one of the details I choose my carry guns: black gun, black shirt, black belt, dark pants... isn't noticed easily. Maybe next time I'll answer the door with the shotgun slung over my shoulder. 
I've considered the "no soliciting" sign, but sometimes I like to make them feel stupid for not having any specific knowledge about the organization they're championing.
I'll have to check with management to make sure I can post signs at the front of my apartment.