Bishop sacrifices to prevent castling I have neen playing a higher amount of online chess as opposed to club chess  lately and something I have noticed is a significant increase in Bishop sacrifices to prevent kingside castling. Here is an example.
rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1
1. e4 e5 2. Bc4 Nf6 3. Nf3 Nc6 4. O-O Bc5 5. Bxf7+

The above is probably the most common instance I have come across of this &quot;tactic&quot; being used..Is sacrificing the minor piece really worth it? Is there name for this tactic, eg &quot;Fianchetto&quot;?
Not worth it.
Tactic used by low rated players which might work against other low rated players but would fail to a halfway decent player.
Run the position through an engine of your choice and see what it says.
No official name but patzer fish rookie beginner could work.
Can not comment.
@David Bateman:  If those ratings are online then they are barely getting out of the beginner rating class.