I don't think you have read the competition rules Aran.
It clearly states in section 12 paragraph 3 subsection d.
12.3.d
The one that wins DPRP's ProgPower competition (hereafter mentioned: winner) should buy all the Progpower Europe forum members present at Progpower a drink (hereafter mentioned: beer). Not conforming to this rule will void winner's right to the prize.
Although forum members are allowed to identify themselves as such, it is not strictly needed. It is winner's responsibility to track down all the forum members in the audience and offer them one (1) beer.
It is however forum member's responsibility to be present on Friday so a beer can be handed to him/her by winner.
This rule does not limit forum member's right to more beer. Local rules and laws on beer drinking are still in effect and supersede 12.3.d if applicable
It's always good to read stuff like that before you enter.........