It very much seems that two people have recently blocked and one or two ghosted me.
It is part of the reason I try to barely invest in others til I begin meeting them, seeing how so easily and harshly they can toss someone away.
I was actually more saddened by one of them cause just when I felt he was different, good communicator and responsible, he seemed to have hit the block on me. Not to mention he seemed nice so as much as I planned to not get attached, he gained a spot in my heart. Where I looked forward to showing him that I care about him and what he's been going through. I lost focus of my guard and got hurt.
Dust off and carry on I shall. I'm not sure when this heart of mine is going to learn its lesson, though hope it does soon! -_-
Anyway, blocking/ghosting however harsh is still a no. So I respect their decision. I don't want someone who is incapable of communicating when things get tough anyway and who thinks so little of me that they feel it's okay to toss me away like that. So in a way, I am glad I saw this side of them earlier. 
If you've been through this, which it seems at least a handful of you have. Do you've a strategy that's different to mine to protect yourself?