No, heres why. This gets implemented. Player x hacks player ys account, gets into the ht and at the 4 minute 50 second mark (First open of the HT) or 1 minute 50 second mark (other opens of ht) (not sure about the times but I'm assuming people understand the point I'm trying to make) starts banning the cvs and bbs.

If this is the defending fleet, well they just lost. If its the attacking fleet they have wasted 5 minutes to open, and however many minutes to get everyone out. There is also no guarenteeing that the player who started the whole debacle will retreat in a timely manner. I know we don't push when people retreat, we just let them waste time, so in theory this can waste a lot of time until someone gets a message to the defending fleet to sink the guy. 

Now this can also happen with mercs and disgruntled fleet members. Seeing that the maturity level of some players is pretty low, I bet this could happen.

Another reason, there are more important things that are needed like game stability. Because you can't control your fleet means it is your problem, not everyone elses. 

then give the power to squad leaders and fleet leaders.....

  this function would in no way remedy your complete lack of organization, preparation or leadership I've witnessed in two SD HA assaults. if the "leaders" where actually leading you wouldnt even have thought up the idea. This is a band-aid idea to cover up plain crappiness.

 GG publicly calling your fleetmates morons. Way to showcase your own leadership skill.