I have recently started receiving obvious Spam texts, but the option to block the senders is grayed out.
I use RoboKiller and receive alerts from them as well that these are known spammers.
Why no option to block these?
Is it coming from an email? Or just text to text? If it's email there is no blocker available for email to text. The community has tried to find one. This has been going through the community a long time and plentiful and nobody can find an email to phone text blocker if that's what is happening to you. Phone texts to text is doable for deletion. My Gmail has a spam filter then "block" the sender. It's not that great because all it does is send the blocked email address to my spam folder. Then I can bulk delete at once. I don't have a text to text blocker either. Only delete.