I would agree that demonstrations of praise, which should be directed toward the Lord, should not be directed toward man. I would also agree that coming together to worship as the body of Christ is a time to focus our heart, mind and soul on the Lord. Having said that, is it so wrong to at times show some appreciation for the work and talents of others during a church service e.g., during announcements?
I don't think so.
The letter of the Law kills, but the Spirit (of Chirst) gives Life!