My right to block

For me I block when I feel an argument is getting stressful, I block for other obvious reasons, like trolls and aggressive people or those that make me really uncomfortable, but If I don't want to argue and someone keeps going, I'm gonna block you, especially if you're being rude and condescending. 

Would you sit and stay in an argument in person with someone insulting you and talking down to you? My guess is no, you'd probably have some choice words for them and then you'd walk away from the situation, this is exactly what blocking is for me online.