This one per cent of users (that 'are not able to support') could be potential customers... Again, if the finding is right, and there is such a low percentage of UK users, people are probably just unaware about vulnerability? I keep it off, so my customers do, and I think we loose nothing. That's up to a webmaster (or what's more right - up to his client) what to choose. If this lad asks about CSS - he needs CSS / HTML solution for a reason.