I, too (years ago) have been guilty of this. In cars, trucks and on motorcycles. I feel almost hypocritical saying anything at all about it, but since it has been 20 years since I rode a bike under the influence and 9 years since I drove a car under the influence (I quit drinking 9 years ago), I have pretty good hindsight. Don't we all! By some divine providence, I never had a wreck drunk, nor did I ever get a DUI (or DWI, depending on what state you're in). All I can say is, if it had happened, I would have deserved it. However, anyone else that got involved, in the case of a wreck, wouldn't have deserved it.
I also had people follow me to "make sure I made it". Seemed logical at the time. However, if the guy behind you sees that a crash is imminent, what the hell is he going to do? Stop you from crashing? Or, watch you turn yourself into a pink foamy spot? Talk the police out of giving you a ticket?
Just as leathers and helmets are cheaper and more comfortable than skin grafts and corrective surgery, taxis are cheaper and more comfortable than DUIs and drunken crashes. It's been said at least a gazillion times, buty if your buddy is drunk, you HAVE to take his keys. Even if you have to fight him to get them. I'd rather have a live friend that's pissed at me than a dead one.