Here are the first paragraphs from the Australian government's travel advice for Australians visiting the countries discussed. Taken from
http://www.smartraveller.gov.au/
Australia foreign office travel advice to Pakistan:
"We strongly advise you to reconsider your need to travel to Pakistan at this time due to the very high threat of terrorist attack, sectarian violence and the unpredictable security situation. If you do decide to travel to Pakistan, you should exercise extreme caution. If you are in Pakistan and concerned for your safety, you should consider leaving if it is safe to do so."
Australia foreign office travel advice to India (updated two days ago):
"We advise you to exercise a high degree of caution in India because of the high risk of terrorist activity by militant groups."
Australia foreign office travel advice to Sri Lanka:
"We advise you to reconsider your need to travel to Sri Lanka at this time because of the very high risk of politically motivated violence. Attacks in Colombo have become more frequent and have killed many civilians. Further attacks can happen at any time, anywhere in Sri Lanka. Australians could inadvertently become victims of violence directed at others."
Australia foreign office travel advice to South Africa:
"We advise you to exercise a high degree of caution in South Africa because of the high level of serious crime."
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Agree with these or not, it's understandable why players read them and worry. Pakistan's is the strongest, followed by Sri Lanka. Although when you read them in full there's a clear distinction in tone where broadly Pakistan's is saying Australian interests may be targets whereas Sri Lanka's is saying Australians may be inadvertantly caught up in violence. India's is nowhere near as strong.