Blizzard will not "delete" anything on an account, unless it was obtained in the game via a glitch or exploit, they will only "freeze" the account while they investigate the validity of the supposed phishing or hacking. For this reason alone I am calling shenanigans on your original statement. 5 toons to 80 in 6 months is however completely plausible, it only takes about 2 weeks, on average, to grind hard to 80.
Now back on track;
After 5+ years of WoW, going back to beta, I have absolutely no desire, draw, need, want, or reason to go back to WoW after FFXIV releases. I got my Kingslayer title (WotLK) on a couple toons, and started doing hardmodes, then said you know what, why bother, it's the same thing just, well, harder, big deal. I think the biggest reason I am done with WoW is Cataclysm, is, in a nutshell, it's the same car with a new paint job. Couple new races that do the same thing the rest of them do, you can fly in Kalimdor and EK now, big deal, I kinda liked taking a flight path, specially when I needed to grab a fresh Dew. Underwater dungeons and locations, whoopity doo, think Deadmines with a blue hue on your screen. /yawn
Yeah, bottom line, time for something new, period. I canceled my sub, handed my guild over to a friend I have been playing with for 5 years and said my so longs with no regret, and no looking back, and I must say, good riddance.
Life is to short to waste by being nice to everyone all the time. Have fun, **** a few people off, it's good for your blood pressure and peace of mind.