This is an example of good (well, ok) general advice, which absolutely does not apply to this specific instance. As general advice it's only ok, because a) the

This is an example of good (well, ok) general advice, which absolutely does not apply to this specific instance. As general advice it's only ok, because a) the details of served HTML can change a great deal and b) some APIs might have this problem, some are unlikely to. Wikipedia is an extreme example of the latter.