You can literally zero it and hit the target 90 percent of the time if you adjust for range and any elevation properly. It would be no different from shooting someone in civ restraints at that distance with a 7.62. Before anything RPG related changed, I deadass went into the editor and played around with the RPGs so I could hit any shot I wanted to within 600m. It took me about 2-3 hours of casually dicking around before I learned how fast they drop after 600m and everything related to RPGs. Mind you this was before I was an admin, and I regret to say I made gangs rage quit just because I was rich. RPGs are very very rarely a reflection of a players skill, and they have decimating effects on a gun fight. Everything else explosive in this server has to be used a certain way.
Suicide vests have a limited range and they kill you.
Grenades are dog shit and also have a limited range. I can't tell you how many times I stood on top of a grenade and took less then 20 damage.
Speed bombs also kill you if you use them on your own car in an offensive manner as well. They don't seem to have the explosive power that a suicide vest has.
TLDR; Fuck the people who wanna win with a point and click explosive weapon. It doesn't involve skill unless you are hitting a shot on a moving target from a decent distance. Even then a good player can hit that shot with a 7.62.