This has happened to me too. Multiple people have used a variation on my GMail address and signed up for stock trading, banks etc., and I keep getting a deluge

This has happened to me too. Multiple people have used a variation on my GMail address and signed up for stock trading, banks etc., and I keep getting a deluge of their invoices, balance statements, promotional emails etc., and the worst part is none of these orgs will easily approach the person using my email and ask them to update their records. The process of complaining is so cumbersome that I elected instead to redirect their emails into Bin and be done with it, but fresh ones from new addresses do show up occasionally. The intruiging part of this is they should never have been able to get a GMail address using a variation of my name (say my removing or adding a .) since GMail says they disallow it, but then I just don't get it how so many people have managed to signup to so many services using such an 'impossible' variation of my address? Is there a loophole in GMail or do all these services accept account registrations without email verification? Either way I'm now seriously considering moving to a different email address and making it something esoteric so no one will think of using it, but that means I'll have to give up on using my name.