Being one myself I am with you 100% I truly loathe other scalpers.
Theres about 3/4 faggots who have pairs of seats in the same aisles as me to the Celtics and always have that shit up on stubhub (I only have 10 seasons so the 8 cheap ones I have are near other scalpers with no intention of going.)
And I do a lot of college football tickets so when I want to sell 200-400 tickets to a football game I always have to dump about 50 in the parking lot since I can't move that many on CL/SH and I hate the motherfucking crackheads who show up to the parking lot with "I need tickets" signs looking for fans to sell them tickets for cheap and taking no risk buying from the team like I do. The people who sell outside the venue are fucking annoying, I wouldn't mind if they just showed up with the tickets they wanted to sell but the way they show up with nothing and just hound everyone who walks by to sell them extras is embarrassing and makes me not like telling people what I do.
The prior advise is accurate though if you want tickets to something buy them the minute they go on sale or don't bitch.