<font face="Verdana, Arial, Helvetica, sans-serif" size="2">My only purpose is to remind others, as I had to be reminded, that these people are dependent on tips for their humble existences. Hotel maids, bellhops, car valets, room service delivery people, and airport skyhops are just some of the people I used to be hit-and-miss in my attention to properly tipping. Not any more.</font>
I tip 15% at a restaurant because the waiters make a tip-dependent, sub-minimum wage. I don't tip at hotels because the employees do not make a tip-dependent wage.
You can tip whatever you want, but don't try to make me feel guilty because someone has a minimum wage job.