I don't have a definitive stand on that issue, but I am certainly not against the legislation being reviewed in that respect. Donations can be a way for young people under the age of 18 to participate in the democratic process, as in the case of membership cards that can be obtained starting at the age of 16. Care must simply be taken not to set an age that is too high.
Furthermore, as you say, we must avoid people using other people's names. If someone's age seems to be implausible at first glance, it will give rise to suspicion that could lead to an investigation by the elections commissioner.