it v-link ADJ -ing
The 'difficult' and 'dangerous' group
These adjectives indicate that the action indicated in the '-ing' clause is not recommended because it is, for example, difficult, dangerous, or useless.
awkward daft dangerous difficult futile hard hopeless pointless precarious ridiculous risky senseless stupid tough useless wrong
It is dangerous driving in Oxford because there are thousands of cyclists without lights.
It was very difficult getting out of the habit of waking up early.
It is stupid taking so many pictures on holiday because when you are old, the thing you will really want is to have pictures of everyday life.