I am more than familiar with BA's back to backs having been crew for them. The difference is that:
1. They are limited to one per 28 days (unless called from standby)
2. Crew are given a hotel room (as you mentioned)
3. Crew are paid a payment
4. 3 MBTR days are awarded
I have never said they are a no-no. All I have said is that a union will help to agree acceptable terms between crew and the airline and make sure the airline sticks to them.
I can fully understand the need for back to backs. I do remember reading when Silverjet first started recruiting last year, that back to back trips would be the usual format.
I'm not trying to force BA ideals onto Silverjet but would recommend bringing in a union to do what's right for Silverjet's situation. If I was Silverjet's management, I would be encouraging it. That way everything is agreed and there won't be any confusion.