[dmoy]

Yes. The former can be argued as more polite, because you're suggesting an alternate course of action (don't stand near wall), and the latter can be construed as an attack on a person's mentality (you're a shy person, don't be that way [that's bad]).

[Jedd]

> The former can be argued as more polite, because you're suggesting an alternate course of action ...

alternative

[dmoy]

In US English at least, alternate can be used as a direct synonym for alternative. Idk if it's the same in British English. Might be different like the phrase "just in case", etc.