Goaltending???

[Eastshire]

Originally Posted by Jurassic Referee

You think correctly. You can call a backboard slap at any time if you think the act was unsporting.

From POE #4 on backboard slapping from the 2008-09 FED rule book....
"The rules specify that intentionally slapping or striking the backboard is a technical. The spirit and intent of the rule is to penalize a player for drawing attention to themselves or as a means of venting frustration."

Iow it's a judgment call...and the slap in the OP also has to be a judgment call.

While that is true, you aren't calling the T based on rule 10-3-4 as it doesn't deal with unsporting acts, you're calling it based on 10-3-6.