Why would IQF shrimp say "do not force thaw under running water"? I recently made a recipe that called for thawing frozen shrimp by running them under cold water.  However, I noticed that the IQF tail-on shrimp I buy from Costco state, "DO NOT FORCE THAW UNDER RUNNING WATER".

Why might they add this capitalized warning?  Would it be a safety issue or a texture issue?
Three possibilities that I can think of:


If the water weren't cool enough and they were big shrimp, it could raise them to a temperature at which bacteria could develop.
If the water were actually warm or hot, it could start to cook the shrimp.
If the shrimp were defrosted directly under water, not in a bag, they could absorb some of the water and the texture would become mushy.


So of course Costco could write "If you defrost the shrimp under water, make sure they're in a bag and the water is cold." But perhaps they feel that people are more likely to read a warning than an instruction, so their current wording is safer.

Just guessing, anyway, but a quick Google search doesn't turn up anything more likely or useful!