Yes, I can see how sniping like that can be effective in a number of ways. I was chasing you just outside of base for several minutes today until I realized what you were doing.
Still, I'm not convinced that there is anything on your list that cannot be done better by a resourceful LO, and a dedicated offense player that cannot make returns usually isn't something a team can afford.
In regards to people "raging" or acting immature against you: expect it. You just about said it yourself: An O sniper's job is to be annoying, to harass, to bully. You're trying to throw people off their games by infuriating them. As far as we know, you are a mature person with the best of intentions, but you must understand that the goals of an O sniper are immature in nature. Expecting people to keep their cool after 2-3 matches of that sort of abuse is unrealistic.
To me, the effectiveness of a tactic is really no justification for making folks feel miserable. If you decide to continue to play as an O sniper, I suggest that you start getting used to being disliked; it's pretty much unavoidable. Judging by the few times I've fought against you, you'd make a fine LO...but it's your choice.