Should the use of multiple UID per key be discouraged?

[Philipp Klaus Krause]

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GPG supports the feature of having multiple UIDs per key.
However this requires special care of anyone signing such a key.
AFAIK, there is no really user-friendly, and definitely no
newbie-friendly way to do so. IMO this makes it much harder to expand
the web of trust.
Would it be a good idea to discourage people from having multiple UIDs
per key, and encourage them to create a separate key per UID instead?

Philipp
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