Ok, it does seem OTT with what the police and the RSPCA have done. There is no way that they gained entry on the only fact that someone said he/they do hare coursing. No way! The wife didn't help............
The RSPCA have built up the intel, probably from hunting sites, locals, videos, photos of these people. Think about it, if this goes to court, do you really think the only evidence that the authorities are going to disclose is that "Someone told us he /they/she was going coursing". i think not. This is probably months of intel gathered before the raid on this family. Yes lots of re