Received NUMEROUS, highly insulting text messages in rapid succession from the owner of stated phone number.  Either that, or somebody is playing with mommy's cell phone.

This is easy to fix:

When someone began doing the same thing to me last weekend from another number, I simply texed them back with the following message: "STOP sending spam to this number, or I will report you to the FCC".

I never heard from them again.

LOL!!!!  GOOD ONE!  I might just actually *do* that as I still have the messages saved on my phone.  I pulled a half way decent trick though - I went under my mobile account settings and changed the text MESSing preferences for that particular phone number to forward the messages to *nowhere*.  So, if that asshat tries to text me again - I won't know about it, I won't even get charged but - he/she will. XD