Good day to all

I already got my tourist visa to Austria it took them 6days to decide about it and till now I still can't believe that I made it through the rain Anyway, my question is that is it possible that the Immigration can stop me or anyone from flying even though I already got the visa?

I've read some blogs and it said that some of the immigration officers are corrupt or they have this crab mentality.. so am a little bit worried about this.

Thanks and God Bless you all