Alright .. I'm going to brave the flames and post my humble opinion here.
My first job was RDM. I leveled RDM to 18, then switched to WHM for subjob. Leveled WHM to 16, then back to RDM until 32. Bouced back again to do BLM and SMN until about 25 or so, then i hit back to RDM until about my 40s. I only include this little history because I want to let you know that Raise was a long time coming.
Now .. I have never, and would never, charge for a Raise. Raise = XP (granted, not much at that level but still), and not just by XP death pentalty, but time lost that could be used to get XP while someone runs back. (not from selb, but say Bastok)
Arguments? WHM needs $$$ .. well no more or less than any other job. Try keeping your spells up as RDM or BLM. Or keeping armor up for a PLD, or arrows for a RNG. All jobs cost money. It's part of the game. And most of us manage without charging for Raises.
Charging for taxi? That's fine. I do it myself. (WHM 38 as of last week. ^^) You're providing a LUXURY SERVICE .. and it's a lot of work to level up WHM/BLM to taxi .. any schmo can level a WHM to 25 in a week or less (some do it in a few days) .. not to mention that some of the scroll quests are a pain. Raise is a 5k spell you get early, and probably one of the ones you will use the most.
NEVER charge for a raise. Tips are alright (and i usually refuse them), but charging for a raise is selfish and crude. Think of all the times YOU got raised on your first/noob/early jobs. And all the times you've had a PT shout for raise in the Nest or Citadel because you didn't recruit a WHM.
If you're in/around the dunes, go /anon. If you're LFG while you farm, then don't /anon but if someone asks you you can say "No." It's simple, two keys and enter. If they start harrassing you, /blist add. Or the ultimate .. use the auto-translator. "<I'm Sorry> <I'm busy right now><I Don't Speak English>" .. how do you argue with that?
I remember when I had just hit 38 RDM, and I was running back to Selbina to get a spell or two when the raise requests came pouring in. I learned to use /anon real fast. ****, i once got called in from S.Gusta to do a raise in the Dunes. I told them "No." and i went on with my life.
Charging for a raise is wrong. If you can do it and get away with it, be my guest. But it's still wrong. And having fits because "I'm getting tells all the time because I'm not /anon" .. oh yea? I get /tells for invites all the time when I'M IN PT ALREADY @ 60 for my RDM. "Care to come level?" .. "<I'm Sorry> .. I already AM" .. does it get annoying? When it does, I /anon.
There are plenty of annoying things in this game. Learn to deal with them, and use the tools at your disposal. You have /anon and /blist for a reason. So please quit whining about it. Thank You.