Even those of us who strongly recommend these pegs are aware that they can be a beggar to pull out of the ground.
This week, in one of my most disorganised camps ever, I realised that I had forgotten my standard peg extractor. It's better than nothing but even with that it can be difficult to get the Deltas out of the ground. However, necessity being the mother of invention and all that, I used the handle end of my Decathlon Hiking Mallet. It was brilliant and the Deltas came out easily.
http://www.decathlon.co.uk/EN/rubber-mallet-3256448/
