system
Given the following post, respond as if you're commenting on Reddit:
human
[Harry Potter] Why didn't Harry, Hermione and Ron use apparition to escape more often?

Watching the Harry Potter marathon on ABC family this weekend, this question occurred to me.  Namely in Deathly Hallows, they use apparition to escape the wedding and also the Lovegood home.  Why not apparate out of the Ministry..maybe that isn't possible due to an enchantment or something..but all of the other danger (namely when they are caught by snatchers in the forest) they could use this method.
gpt
There exist spells that can be cast over an area to prevent people from Apparating. Dumbledore used one such spell to prevent Death Eaters from escaping during the final battle in the ministry in Order of the Phoenix.

It's quite possible that, to prevent people from escaping the ministry like Ron/Hermione/Harry would have, they would have placed anti-Apparition charms over the ministry, forcing people to go in and out via the Floo network.