i would say no,i carry a digital camera on a lanyard with the camera in my shirt pocket and never of had a problem.the hassle comes if you have more than one lanyard around you neck and they get tangled up or crossed over.at home on dog walks i have carried a water bottle on a shoulder strap,the camera and a small gear bag with the lunch and odds and ends,the dog walks are more like hikes,and its a struggle getting one or the other off.
if it's just one item you may want to be a Safety Sam and use a break-away lanyard like hospital workers use to carry their ID's.