This drop would have hit quite a few with stops in place. I don't think this news represents the drop we are seeing, especially after several big drops when Poland news was released the end of last year which saw a massive drop then.
i think a lot are buys,i for one have bought on two ocassions both showed as sells.that was 100,000 shares in total, a small amount but also all the shares at the same price showed as a sell. don't assume a sell is a sell.