I often saw that in the end of dhamma talks by bhikkhu, the monks will give water sprinkle blessing (although not all blessing use water sprinkle). It looks like this if you haven't known: the main monk will chant paritta, then while the monk is chanting, the other monks will walk around the audiences and sprinks the (holy?) water on them. The audiences will be told to keep silent and make anjali gesture (not mandatory at all) while the blessing is ongoing. When the chanting is done, the water sprinkle will stop too.
1. Is water sprinkle blessing (or general blessing) allowed in vinaya and sutta?
2. Does blessing really has benefit for the people? I worry the blessing will make buddhists to grow attachment to rites and rituals.
I often thought when I got the water sprinkle (especially if it's done by forest monks), some good things will happen to me later