It's kind of amusing that someone like me soliciting sex for money (a criminal act and thus a criminal) from a person providing sex for money (a criminal act and thus a criminal) is demeaning (ruthless scamming scumbag) enterprising individuals. All are committing non-violent criminal acts; you don't really think these individuals (guys or gals?), other than sending out these stupid texts, are actually hurting anyone do you?
I repeat, just ignore them.
Ps. another approach, if it makes you feel better, is do do what I sometimes do: if I'm doing something mindless like prep work for a meal, and I get an unsolicited phone call, I put the phone on speaker and waste their time as long as possible. These individuals calling are paid on commission (I assume) and time is money.