Dizzee's advice is spot on. If you've got a radio, it's good airmanship to call if you're flying near one of these areas, especially if crossing the actual approach or missed approach areas.
If you don't have a radio, it's best to avoid them, or at least phone the relevant ATC unit before you take off to give them a heads up.
Most procedures (but not all) are based on a 3 degree glidepath. It's not a good idea to try and sneak under or climb over the approach area to avoid talking to ATC. This causes problems as we don't know your intentions and will most likely have to break off traffic on the approach if it looks like you are going to get within 5 miles of it.
LXGB