Is it possible for 3 people to stalk each other at the same time?

Of course. There are 3 people so we have person X, person Y, and person Z. Person X, Stalks Person Y, In turn Person Y stalks person Z, and if you In turn it even More then Person Z would Stalk person X. Therefore, Yes

It possible for 3 people to stalk each other at the same time!>;0

tyvm