It is a constant policy, from all "FSF-followers-free-software-activists" to try to discourage, on all public discussion forums, the use of the EUPL that is a copyleft license "other than GPL/AGPL". However, the referenced EUPL guidelines explain in full detail why using it is not "bad" or "wrong". The EUPL licence is 3 times shorter than the GPLv3, clearer, multilingual, interoperable and compatible with the GPLs/AGPL. The FSF "strong copyleft theory" that linking propagates the GPL license was not (and will never be) validated by EU courts.