Dosent relly matter if you do that, you will get stuck under the roof and cant go down to the flag
no this isnt true i think. we did it with HRE and it worked i believe (didnt go there myself because i had a problem with the banner and was in the opposite team)
imo there is no reason why this woulndt be allowed, its a tactic that needs coordination and teamwork and disallowing that would be retarded (this costs money, takes 3 slots and you need to be quick)
this is not like in battle where you are camping a unreachable roof, its your only way to be able to push to the flag once you got on top of that (otherwise you have to go all the way around)